Opteka Medium 5 X 4 inches Color and White Balance Reference Grey Card Set With Quick Release Neck Strap for Digital Photography
Includes three color calibrated reference cards * Dimensions 5" X 4" 0.1" (130mm by 100mm) * Logo label with focus target is affixed to one side of the grey card. Both sides of the cards are usable for white balance * Works with any digital camera, for JPEG and RAW files * Lanyard Strap Included